NLO corrections to the Wandzura-Wilczec, twist-3, nucleon DVCS amplitude factorize!

摘要

We computed the NLO corrections to the twist-3, L --> T flavor nonsinglet amplitude in deeply virtual Compton scattering (DVCS) off a nucleon in the Wandzura-Wilczek approximation. Explicit calculation shows that factorization holds for the NLO contribution to this amplitude, although the structure of the factorized amplitude at the NLO is more complicated than in the leading-order formula.